Heating apparatus



R. D. GRANGER.

Heating Stove.

Patented .Jani 18, 1859.

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NITED STATES PATENT QFFIG.

R. D. GRANGER, OF PHILADELPHIA, PENNSYLVANIA.

HEATING APPARATUS.

Specification forming part of Letters Patent No. 22,642, dated January18, 1859; Antedated November 24, 1858. l

To all whom 'it may concern:

Be it known that I, RENssELAER D. GRAN- GER, of t-he city and county ofPhiladelphia and State of Pennsylvania, have invented a new and usefulImprovement in Heating Apparatus; and I do hereby declare the followingto be a full, clear, and exact description ot' the same, reference beinghad to the accompanying drawing and to the letters o1 reference markedthereon.

My invention relates to an improvement in stoves or heaters in which anair chamber situated above the lire is used for receiving a supply ofcold air below and discharging it in a heated state through an openingabove, and my improvement consists in combining with the air chamber aseparate chamber perforated with holes and having an independentcommunication with the external air, the second or supplementary chamberbeing so situated in regard to the first, that while it serves thepurpose of efectually consuming the gases arising from the products ofcombustion it serves to protect the bottom of the general chamber fromthe injurious action of the fire.

In order to enable others to make and use my invention, I will nowproceed to describe its construction and operation.

On reference to the accompanying drawing: Figure 1, is a verticalsection of my improved heating apparatus. Fig. 2, a transverse,sectional plan (inverted) on the 1, 2 (Fig. 1).

A is the body of an ordinary coal stove, B the hollow base for receivingthe ash pit, C the cap of the stove, D the tire pot, E the grate, F thefire-door, and I the pipe communicating with the chimney.

Although the stove illustrated forms a convenient portable design forapplying my improvements in heating apparatus, various modified formsmay be substituted.

In the interior of the stove I hang an air chamber G, the top of whichpasses through an opening in the cap C, there being a free access of airto the lower end of the chamber, through one or more passages a.

Adjacent to the under side of the cham ber G and separated from thesame, is secured an annular chamber H, which communicates with theexternal air through a small independentpassage This annular chamber hasa series of perforations on the under side.

A pipe communicating with an adjacent or upper apartment may beconnected to the end of the chamber G, which projects through the cap,or this end of the chamber may be covered with a grating or register, soas to allow the heated air from the chamber to escape directly into theroom in which the heater is situated. The air chamber G being situatedbut a short distance from the fire, becomes rapidly heated, and the airentering through the passages a, has a corresponding heat imparted toit, and escapes either through a register on the cap, to add to the heatimparted to the room by the radiation of the heater itself, or passesthrough pipes to any adjacent apartments. As the products of combustionrise, they are met by ets of heated air from the chamber I-I, whichignite the gases, and cause them to pass upwards, in the form of aflame, to the chimney. It will thus be seen, that the sides of thechamber G as well as the bottom, with the exception of the annular spaceobstructed by the chamber H, are completely exposed to the ignitedgases, and that an extensive supply of heated air is obtained at theexpense of a comparatively small amount of fuel.

The annular chamber H, besides serving the purpose of igniting thegases, also tends to protect the corners of the main chamber G fromrapid destruction by the action of the fire. When the annular chamberitseltl becomes deteriorated by the act-ion of the lire, it may bereadily removed, and replaced by a new one.

In heaters of the larger class, I propose to use two or more chambers G,with a perforated chamber H attached to each.

I do not claim broadly an air chamber situated in a casing and exposedto the action of the lire within the same, as such a device has beenheretofore used but I claim and desire to secure by Letters Patent-Combining the air chamber G with the separate perforated chamber Hhaving an independent communication With the air substantially as hereinset forth, so that the said perforated chamber may serve the doublepurpose of consuming the gases arising from the ignited fuel and ofpreventing the rapid destruction of the bottom of the chamber G by theaction of the re.

In testimony whereof7 I have signed my naine to this specication beforetWo subscribing Witnesses.

RENSSELAER D. GRANGER.

Witnesses:

HENRY HoWsoN, HENRY ODIOVNE.

